Hierarchy classification:

1. top of the aat hierarchies
2. Materials Facet
3. Materials (hierarchy name)
4. materials (substances)
5. [materials by composition]
6. inorganic material
7. glass (material)
8. [glass by property]

Anotations

Scope note:

Glass for which reflectivity has been reduced by the application of coatings; the coatings disperse reflections and increase the light transmission to almost 99 percent. The standard nonreflective coating is magnesium fluoride, which gives glass a bluish tint.